I had head about the possibility of shooting satellites into space with extremely large cannons. But haven't heard anything new on this idea. Is this way of getting stuff to space just something that wont work or is there some new research in this area I just haven't heard about?

They managed to fire a projectile (just a dead weight, not a satellite) up to an altitude of 180 km. So it reached space, but wasn't fast enough to go orbital.

The lead scientist was Gerald Bull. His story is quite interesting, if somewhat unfortunate. After the US cancelled his funding he went to Iraq to work on their space gun. In response to this the Israelis assassinated him (so it is believed, it was never actually proven who killed him).

Anyway, the problem with space cannons, of course, is that the initial acceleration is so great that it's likely to destroy any equipment being carried in the projectile. You certainly couldn't launch a human this way.

Alternative is to increase the acceleration slowly, but then you need a giant launch system. A gun with an extreeeemely long barrel, so to speak. We're talking many kilometers in length.